\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{EWCS descriptive statistics (by year)}
\begin{tabular}{l*{3}{c}}
\toprule
            &        2005&        2010&        2015\\
            &            &            &            \\
\midrule
Age         &        39.5&        39.9&        41.3\\
            &      (11.5)&      (11.5)&      (11.7)\\
Male        &        .556&        .558&        .527\\
            &      (.497)&      (.497)&      (.499)\\
Tertiary degree&        .261&        .313&        .354\\
            &      (.439)&      (.464)&      (.478)\\
Part-time worker&        .179&        .194&        .221\\
            &      (.383)&      (.396)&      (.415)\\
Temporary worker&        .105&        .106&        .113\\
            &      (.306)&      (.308)&      (.316)\\
Self-employed&        .157&        .155&         .14\\
            &      (.364)&      (.362)&      (.347)\\
Job tenure  &        9.49&        9.46&        9.75\\
            &      (9.66)&      (9.51)&       (9.6)\\
\midrule
\(N\)       &       26714&       36229&       36410\\
\bottomrule
\end{tabular}
\end{table}
